By adding a single short paragraph to an application for a court order through the Stored Communications Act (this wouldn’t even a require a search warrant), the FBI would be able to order your ISP to divulge every website you have contacted and every app you have used. In cases in which the FBI has obtained a search warrant, it could ask your ISP to reveal every single piece of content that it has a record of you having viewed — over the course of years.
Our government-access laws do not require the FBI to tell you about these requests, and the FBI almost always forces a gag order on ISPs, ensuring that you will never find out.
.. What the new law would do is give ISPs the incentive and the congressional and presidential seal of approval to construct the richest database of Web surfing and app-usage behavior the world has ever seen. This will be a honeypot attracting the FBI and other law-enforcement agencies like flies.